The New England Patriots are second at $1.8 billion, followed by the Washington Redskins ($1.7 billion) and the New York Giants ($1.6 billion).

In all, 23 NFL teams now have a value of at least $1.0 billion, up from 20 in 2012. The average value is now $1.2 billion.

At the other end of the spectrum, the Oakland Raiders are now the least valuable franchise in the NFL, valued at $825 million. Last year's least valuable team, the Jacksonville Jaguars, jumped up to no. 31 ($840 million).

The Cowboys' value rose 10%, up from $2.1 billion a year ago. The St. Louis Rams had the largest one year jump in value, with a rise of 12% from $780 million to $875 million.